Reciprocating work carrier for marking machines



I 1948- VH.P. HINTZ ElAL 2,435,215

RECIPROCATING WORK CARRIER FOR MARKING MACHINES Filed Dec. 29, 1944 2 Sheets-Shet 1 INVENTOR.

r-IERBERT P. l-HNTL By WILLIAM L KLEPAC/ 6.5mm ykflmu ATTORZVEYS Feb. 3, 1948.

H. P. HINTZ ET AL RECIFROCATING WORK CARRIER FOR MARKING MACHINES Filed Dec. 29, 1944 2 Sheets-Sheet 2 INVENTOR.

' HERBERT P. HINTL y g NlLLlAk/l L.KLEPAC $64M do ATTORNEY! Patented Feb. 3, 1 948 OFFICE RECIPROCATING WORK CARRIER FOR MARKING MACHINES HerbertP. Hintz,'Moline, 111., and William L.

' Klepac, Davenport, Iowa Application December 29, 1944, Serial No. 570,426

1 Claim; (01. 101-4) (Granted under the act of March 3, 1883, as

The invention described herein may be manufactured and used by or for the Government for governmental purposes without the payment to us of any royalty thereon.

The present invention relates generally to the art of impressing or imprinting indicia, such as amended April 30, 1928; 370 O. G. 757) markings, letters, numerals or other symbols onto various articles of metal or other material wherein the application of force is employed through a die or other marking member to protime an identifiable deformation of a permanent character in the article to be marked. This operation is usually termed symboling by those skilled in the art and is so referred to hereinafter.

More particularly our invention relates to improvements in presses for performing symboling operations and provides for the symboling of screws, bolts and like material by means of a symboling device operatively connected to a press platen. together with a mechanism for conveying the symboled articles to a predetermined position under said platen, and means for ejecting them into a suitable receptacle after they have been symboled. More specifically these results are obtained by means of a holder in which is inserted the symboling die that it is desired to imprint, mounted on the press platen, a ratchet device or indexing mechanism for progressively rotating the mechanism carrying the symboled articles, and cam means for discharging said articles from said carrying mechanism.

In the past it has been the custom to symbol screws, bolts and similar articles by placing them in a plurality of spaced holes formed in a heavy rigid metal plate, the size of said holes depending upon the diameter of the articles to be inserted therein. The desired symbol was imprinted by means of an individual hand operation employing a conventional hammer and a hand-held die member. Performance of the work in this manner resulted in physical strain to the worker, which tended to reduce his output, the average person usually being unable to work continuously for more than approximately two hours. The d gree to which production was curtailed, of course, depended upon the physical endurance of the individual operator and, in the case of women, it was more noticeable than in men.

Accordingly, one of the objects of the present invention is the provision of a symboling device which can be conveniently operated by women and others of limited physical powers with a minimum of effort.

Another object of the invention is the production of an improved symboling machine that will be safe to operate, experience with past devices having demonstrated that physical injuries have been inflicted by misdirected blows of hammers used in the symboling operation as carried out in'accordance with the teachings of the prior art.

It isanother important object of the present invention to provide an improved mechanism for the simple, convenient, speedy and safe symboling of screws, bolts and the like.

Another object of the present invention resides in the provision of a structure for automatic ejection of the symboled articles from the mechanism carrying them.

A still further object of the present invention resides in the provision of an adjustable mechanism enabling various sizes, shapes, and quantitles of articles to be symboled in the same device.

A preferred embodiment of our invention whereby we attain the above and other and further objects is illustrated in the accompanying drawings wherein like numerals refer to like parts throughout the several views, and wherein:

Fig. 1 is an overall front elevation view of'a complete press mechanism including an improved symboling device according to our invention;

Fig. 2 is a front perspective view showing one form of work piece carrier used in the symboling operation;

Fig. 3 is a plan view showing the indexing and discharge mechanisms of a preferred embodiment of our invention; and

Fig. 4 is a. sectional view taken on the line 4-4 of Fig. 3;

Referring now particularly to Fig. l, in which the press mechanism generally is designated 46, there is illustrated a fixed press platen comprising a transverse frame member I, adapted to re-' ceive a slide bar 2 and supported by two uprights 3 and 4 secured to the frame of the press. A base 5; adapted to receive the carrying means for articles to be-symboled rests on a table 6. Any convenient method such 'as hold-down bolts 1 may be employed to secure the base 5 to the table 5. A holder 22, in which may be inserted the various die symbols 2!, which it is desired to impress or imprint on the articles to be processed, is secured to the slide bar 2. adapted to be moved longitudinally of the frame I by means of a lever 8 pivotally mounted on the slide bar 2 as at ti and engaging the fixed frame structure of the press as by means of a slot and pin connection iii. The purpose of the slide bar 2 is to provid means for adjusting the holder laterally within the frame member 1 although in The slide bar 2 is the actual operation of the device this adjustment is made initially as a setting up operation and the selected position is retained throughout th symboling operation for example by means of a setsorfiw 44.. When it is ad fii iti 139 c a g the ym o or s m l in e ho d 22, th m y be accomplished by means of an adjusting member such as the screw shown at 31 in Fig. 1.

A work carrying means such as a notched plate 9, particularly shown in Figs. 2 and 3 and adapted to hold articles to be symboled, is rotatably mounted on a supporting memherfifi positioned on the base 5. The plate 9 is rotatably mounted on a boss 38 forming a pintle and extending from the top of the supporting member 35, the-bottom of said plate 9 bearing on the supporting member 35. The plate 9 is held down by means of an ejector cam 23 mounted on the boss 38 .as :&t 2A and hereinafter referred to. i

The table 6 which carries the base 5 and the means for holding articles to he s-svm oled. is raised :by the press mechanism by-the introducticnintosaid press of fluidpressnre such com-- pressed Lair th ou hra pedal waive i=8 ad pted to b depressed by t foot of the mess operator. lithe lease 5,5 is e evat d to a point which brin s at lea t one of h articles to :be emboled :imto orcible contac w th the .diein h .holder;22 as a result of which said qart le is :pressed heavily aeainstsaiti d e. As the base 15 is elevatedjt ic operates w th ides 1.9 an whichare mahin s; intot e fixed p ess st u t re. .It v /ill be readily understood that anysllftable *power ,system m y be employe as ama s a tu ting mean the lone chosen to be shown in the preferred embodiment of our invention illustrated and descriheddi rein lee-inc pneuma ic.

Indexing of the notched plate 9 whereby itis progressively rotated is obtained byz-means of a paw-l H1, at dink t2 and cooperating mechanism oomprisingabell crank lever l3 pivotally mounted on a back member 29 as by means :of a ;pin 3.2. When the table :.6 is raised by depressingathe pedal valve zl'8zthe bell crank'lever l3 rotates in a counterclockwise direction about its Pivot at 932, through the actuation of a drive rod 11.4. *The drive rod 14 is pivotally mounted at its other end oma holding member i5 which :in-turn is secured to the frame I. The opposite or operatingiend 33 of thelbell crank lever B is connected-by aslot andinin connection 34 to the link ill! to the other end of which the pawl '10 is vpivotally connected by a pin ;l:l. When the table is :raised and the lever I3 is rocked as aforesaid, the link 12 and the pawl iii are retracted fromyright to deft, :as shownin dotted lines in Fig. :2, which-action cams thepawl ,0 back into the immediately precedine notch in ;the-p1ate:9,:the pawl lafl being forcedinim the l-n-otch 'by the action of :the .spring wire 16 mountedon thep-awl it and the link :112 and :held by retainers l I. As @the pawl H) moves out .of the notch in the plate 3 in :Which-it is disposed, it exerts zpressure ion the sprin wire Iii/and the spring action of said wire forces :the'pawl into the immediately preceding notch in the plate ,9 to which said pawl has been retracted. Durin thisca-m retracting operaticnia stop secured :to an extension :39 ,on the back member 1.29, as shown in ;Fig. ;:3, prevents reverse rotation of :the plate 9, s d m y also-se ve t l t he fo a d sh vementlf'thepawl H). The table 6 isloweredby gravity when thefoot of the operatoris removed from h pedal valve l8 thus usinethe .link 1-2 and the p wl-l0 t mo e iorwa -toithei in ti position- ;T s r turn ov mentis ,efie tedbythe articles ride well within said notches.

4 action of the bell crank lever l3 which rotates about its pivot 32, the left-hand end of the bell crank lever [3 being supported in a raised position by the drive rod 14 and the hol n me ber 1' s cur d o the f ame h forward movement of the pawl Ill brings its straight edge into engagement with the opposite ly disposed face of the notch in which said pawl is positioned, which action rotates the notched plate .S'nnenotchin a clockwise direction. It will be evident, however, to those skilled in the art that -try appropriate modifications of the structure herein disclosed, the notched plate 9 could be made to rotate counterclockwise and we do not, therefore, desire to be limited to clockwise rotation. The link l2 rides in a keyway 42 on a bed on top of the vertically raised back member 29 secured the haee ,5 and is guided in its movement by a guide plate 36 afiixed to said back member 29. A key 45 serves to prevent lateral movemente the l nk 2..

1 th const u o of the n tch plate best sh wn F g 2 and :3, it i a re t that th notches are of sufficient depth to accommodate relatively la ge screws, olts nd the like wh a e to be symboled and as shown in Fig. 3 these L F e he pacit-y of th s n ches is s ffici n to perm t on: e sem nt of the pawl .10 with e c f th n tch n [t e plate 9 coinc dentally i h h ccupation of said no e h-y a ticles to he evmholed, the paw L a in eac o h notches nde t h ad o t e screws b ts or othe s mi a t c to he processed.

As he ;-n.o hed plate 9 advan e in its TQtational ,rnovement, the symboled [articles are dishar ed there rom a t i mbc ns y mea s o e elec or c m Z is mountedzas by mean or a screw '24 o th boss .38 on th su rtin member 3 5. :A z-dowel pm ,25 also. is mount d uleQh e boss 53B and en a s an apertu in the ca 23 t pr s nt th latter from ch orine a th p ate 9 is otat dh .s mholed a t c es a e discha ged hem t e pl t -1 a 2.6 by being pushe ofi or uided r m ai p at by a s de edge o theveiecto ar z-z t I e e c o thi eot s t force them into a appropr ate y loca d chute 21hr w ich they are uid d to any su t b w re eptac e as at 18 restmg o a tsurpo t suchla 4J- Rrematiire .di soharge vfrom the p ate 9 is avoided by guards 3! and A3.

.S rews bolts d like mate ial of dif e e shapes, dimensions, lengths, quantities and sizes ay beymb ed by he bst tu o r t pl te 9 of ot e sim l r pl tes var ing sizes dimenions and ca acities and y aclj-iustment-cf the drive rod L4. This ad ustment is .effected .by means .of .a-Scries of adjusting holes such as are i ustrated th be 1.. rank l ver 5 .3 a d the hold ng member .5. T e dr ve-r d t is d pted o Interconnec ed man suitabl y itheh dia membe '5 and t0 t e hel an leve b means o h hole h. .wn i eac m mb r the pa ticu ho s tub vse d eperu n upon h relationsh p be ee th le th .of stroke o he pressdurinsth symbo ineo e e oh a dtheisi qfthea tic e oramoun of n erin m amehtre quired. Y

The prese t nventionis es ecia y adantedli use in machine shop or the .sy bo ing of Ma t ous articles suc as th se .descrih d'here n a d has been found to be hi h y em en ini e ee ing production and in providing ease and safety o operation. Many ada ta io s an modif e tion of the struc ure herein disc osed wil r ai ily suggest themselves to those skilled in the art without departing from the spirit and scope of our invention. For example, in the preferred embodiment of our invention shown and described herein, the screws, bolts or other articles to be symboled are manually-fed by the operator into the notches in the plate 9. It is evident, however, that suitable mechanism could be employed for accomplishing the feeding automatically and consequently it is not our intention to be limited by the method of feeding herein disclosed.

Accordingly it is our desire to be limited herein only by the prior art and the appended claim.

We claim:

A symboling machine comprising a fixed upright base having an upward, overhanging portion including a stamping die, a carrier portion mounted on the base below the die and arranged for vertical motion to and from the die, a disc member having peripheral notches mounted on the carrier portion for rotation about a vertical axis, means on the carrier providing a guideway extending generally tangentially to the disc member, a slider in the guideway carrying a springbiaeed pawl engageable with the said notches for step-by-step rotation of the disc member, a bellcrank medially pivoted on the said means, and with one distal end engaging the slider and the other articulated to the said overhanging portion of the base whereby the pawl is reciprocated horizontally on cyclic vertical motion of the carrier portion, a guide member positioned to urge work pieces into snug engagement with the notches in the region of the die, resilient means extending within the outer periphery of the disc, yieldable to pawl-urged motion of the disc but rigidly retaining the disc against reverse motion, and a cam positioned on the carrier centrally of the disc and extending to the peripheral region of the notches for removal of the work pieces.

HERBERT P. I-HNTZ. WILLIAM L. KLEPAC.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 506,374 Richards Oct. 10, 1893 651,329 Hagen June 5, 1900 653,915 Kinyon July 17, 1900 675,168 Rosenblum May 28, 1901 982,199 Ames Jan, 17, 1911 1,892,545 Ward Dec. 27, 1932 1,906,363 Browning May 2, 1933 1,938,969 McKinnon Dec. 12, 1933 1,960,486 Freeman May 29, 1934 2,058,671 Dubuit Oct, 27, 1936 2,103,270 Murch Dec. 28, 1937 2,341,409 McDonell Feb. 8, 1944 FOREIGN PATENTS Number Country Date 539,773 Germany Dec. 7, 1931 

